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An a$_{0}$ resonance in strongly coupled πη, K$\bar K$ scattering from lattice QCD
(American Physical SocietyPhysical Review D, 2016-05-11)
We present the first calculation of coupled-channel meson-meson scattering in the isospin =1, G-parity negative sector, with channels πη, K$\bar K$ and πη′, in a first-principles approach to QCD. From the discrete spectrum ...
Turning on gravity with the Higgs mechanism
(IOP PublishingClassical and Quantum Gravity, 2016-06-21)
We investigate how a Higgs mechanism could be responsible for the
emergence of gravity in extensions of Einstein theory, with a suitable low energy limit.
In this scenario, at high energies, symmetry restoration could "turn ...
Numerical solution of Sturm–Liouville problems via Fer streamers
(University of CambridgeDepartment of Applied Mathematics and Theoretical PhysicsHomerton College, 2016-06-28)
The subject matter of this dissertation is the design, analysis and practical implementation of a new numerical method to approximate the eigenvalues and eigenfunctions of regular Sturm–Liouville problems, given in Liouville’s ...
Multiwavelength study of 20 jets that emanate from the periphery of active regions
(EDP SciencesAstronomy & Astrophysics, 2016-04-15)
$\textit{Aims}$. We present a multiwavelength analysis of 20 EUV jets which occurred at the periphery of active regions close to sunspots. We discuss the physical parameters of the jets and their relation with other phenomena ...
Time-domain implementation of an impedance boundary condition with boundary layer correction
(ElsevierJournal of Computational Physics, 2016-06-08)
A time-domain boundary condition is derived that accounts for the acoustic impedance of a thin boundary layer over an impedance boundary, based on the asymptotic frequency-domain boundary condition of Brambley [2011, AIAA ...
The Importance of the Unsteady Kutta Condition when Modelling Gust-Aerofoil Interaction
(ElsevierJournal of Sound and Vibration, 2016-06-01)
The Kutta condition is applied to aerofoils with sharp trailing edges to allow
for viscous effects to be considered within a simplified system of equations
that are inviscid. This paper discusses in detail the inclusion ...
Numerical Relativity and High Energy Physics: Recent Developments
(World ScientificInternational Journal of Modern Physics D, 2016-07-15)
We review recent progress in the application of numerical relativity techniques to astrophysics
and high-energy physics. We focus on recent developments regarding the spin
evolution in black hole binaries, high-energy black ...
Gravitoturbulence in magnetized protostellar discs
(Oxford University PressMonthly Notices of the Royal Astronomical Society, 2016-05-11)
Gravitational instability (GI) features in several aspects of protostellar disc evolution, most notably in angular momentum transport, fragmentation, and the outbursts exemplified by FU Ori and EX Lupi systems. The outer ...
ππ→πγ$^{∗}$ amplitude and the resonant ρ→πγ$^{∗}$ transition from lattice QCD
(American Physical SocietyPhysical Review D, 2016-06-10)
We present a determination of the P-wave ππ→πγ$^{⋆}$ transition amplitude from lattice quantum chromodynamics. Matrix elements of the vector current in a finite volume are extracted from three-point correlation functions, ...
Quantifying eddy feedbacks and forcings in the tropospheric response to stratospheric sudden warmings
(American Meteorological SocietyJournal of the Atmospheric Sciences, 2016-08-26)
The equatorward shift of the zonal mean midlatitude tropospheric jet following a stratospheric sudden warming in a comprehensive, stratosphere-resolving model is found to be well quantified by a simple model, due to Lorenz ...